Optically variable interference devices

(19)

(11)

EP 0 786 676 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.09.1997 Bulletin 1997/36

(43)	Date of publication A2:
	30.07.1997 Bulletin 1997/31

(21)	Application number: 97105354.1

(22)	Date of filing: 15.08.1991

(51)	International Patent Classification (IPC)⁶: G02B 5/28 // (B42D15/10, 211:00)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30)

Priority:

16.08.1990 US 568419

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	91307556.0 / 0472371

(71)	Applicant: FLEX PRODUCTS, INC.
	Santa Rosa California 95407 (US)

(72)	Inventors:
	Coombs, Paul Graham Santa Rosa, California 95405 (US) Phillips, Roger W. Santa Rosa, California 95405 (US)

(74)	Representative: Bayliss, Geoffrey Cyril et al
	BOULT WADE TENNANT, 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)


	Remarks:
	This application was filed on 01 - 04 - 1997 as a divisional application to the application mentioned under INID code 62.

(54)	Optically variable interference devices

(57) The disclosure relates to an optical variable interference device with peak suppression having a reflector (16) with first and second surfaces (17, 18). A thin film multilayer interference stack (11) is disposed on the first surface. The interference stack is comprised of at least two periods with each period being comprised of a metal absorber layer (21; 23) and a dielectric space layer (22; 24).

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